/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/MeshUVFunctions.h
CopyMeshToMeshUVChannel will copy the 3D UV Mesh back to the UV Channel. This pair of functions can then be used to implement UV generation/editing via other mesh functions.
static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * CopyMeshUVLayerToMesh ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * CopyFromMesh, int UVSetIndex, [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * CopyToUVMesh, [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) *& CopyToUVMeshOut, bool & bInvalidTopology, bool & bIsValidUVSet, [UGeometryScriptDebug](API\Plugins\GeometryScriptingCore\GeometryScript\UGeometryScriptDebug) * Debug )